Finding the Fourth Proportional to 9,856.69, 14,787.46 and 2,931.19

Step by Step Solution

1. Step 1: Write the proportion equation
   9,856.69 : 14,787.46 = 2,931.19 : x
2. Step 2: Convert to fraction form
   9,856.69/14,787.46 = 2,931.19/x
3. Step 3: Cross multiply
   9,856.69x = 14,787.46 × 2,931.19
4. Step 4: Simplify right side
   9,856.69x = 43,344,821.57
5. Step 5: Solve for x
   x = 43,344,821.57/9,856.69
6. Step 6: Final answer
   x = 4,397.50